International flights bound for the United States continue to be targets of terrorist activity, as demonstrated by the October 2010 discovery of explosive devices in air cargo packages bound for the United States from Yemen. The Transportation Security Administration (TSA) is responsible for securing the nation's civil aviation system, which includes ensuring the security of U.S.-bound flights. This book explores the steps the TSA has taken to enhance its foreign airport assessment procedures since 2007, with a focus on foreign airports and inbound air cargo.